Process for the preparation of silicon-containing composite particles

GB2638575APending Publication Date: 2025-08-27NEXEON LTD
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Patent Information

Application Number
GB2025002162
Authority / Receiving Office
GB · GB
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-10-11
Filing Date
2024-10-10
Publication Date
2025-08-27

AI Technical Summary

Technical Problem

Existing processes for preparing silicon-containing composite particles for use in lithium-ion batteries are inefficient, leading to poor throughput and product quality, particularly due to mass transfer limitations and the formation of coarse silicon structures.

Method used

A semi-continuous process involving a pressure reactor where porous particles with a high total surface area are continuously agitated and supplied with a silicon precursor gas, allowing for consistent deposition of silicon within the pore structure and improved control over reaction conditions.

Benefits of technology

This process enhances the control over the deposition reaction, resulting in composite particles with better silicon distribution, reduced coarse silicon content, and improved cycling behavior, while also increasing throughput and reducing production time.

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Abstract

The invention relates to a process for preparing composite particles, the process comprising the steps of: (a) providing a plurality of porous particles in a pressure reactor; (b) contacting the plurality of porous particles with a silicon precursor gas at conditions effective to cause deposition of silicon in the pores of the porous particles to provide composite particles comprising a porous particle framework and elemental silicon within the pores of the porous particle framework.
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Citation Information

Patent Citations

  • Method for producing silicon-containing composite particles

    CN116829503A

  • Process for preparing electroactive materials for use in metal-ion batteries

    WO2021048557A1

  • Vibro-thermally assisted chemical vapor infiltration

    WO2022035879A1

  • Process for preparing silicon-containing composite particles

    WO2022084545A1